Chaos Invasion
From Kronthor Wiki
Prior to the first Cataclysm, a Chaos Portal opened up on the edge of the Wildlands for unknown reasons. From this portal streamed armies of giant and deadly Chaos Barbarians. This invasion laid waste to the Citadel Protectorate and nearly destroyed the Crystal Citadel itself before the invasion was thwarted by Champions of Max.
Image of a Typical Chaos Barbarian:
